Portable drilling unit



Flled April 5, 1949 s, siRAcusA PORTABLE DRILLING UNIT 2. SHEETSSHEET l I o .0 do umm' "1%}.

W n 2w. .957/ 57646054 Sept. 30, 1952 s; SIRACUSA 2,612,347

PORTABLE DRILLING UNIT Flled April 5, 1949 2 swims-swam 2 mmn WVZ/V/di .f/sr/ 57640054 I BL gitilsi-mwgi sa Eeafinrin siflali i. 1

1 Application April 5, 1s4a 's iai n ttgfetf applicable onawell.

Argalriect of my inve tiqnisgto provide a, port; able dril ing. unitrwhiqh. mates the necess y of moving large and heavy kellys, rotary tables, and other heavy equipment into a derrick.

My invention is applicable for all light rotary work, and particularly, the work which requires a short time, thus eliminating the inefliciency and danger of rotating strings or other pipe by hand.

My invention is applicable to casing, drill pipe and tubing cutting for drilling out cement, for backing of! sucker rods and tubing, for drilling out obstructions in casing and tubing, for milling operations. for scraping liners, etc. I

Another object of my invention is to provide a novel portable drilling unit which'is compact and simple in construction, which can be readily moved into position in a derrick and supported therein, a unit being provided with means to prevent its rotation under high torque stresses.

Another object of my invention is to provide a drilling unit of the character stated, which can be rotated in either direction as desired by the operator.

A feature of my invention is the inclusion of a fluid motor to drive the unit, thus eliminating the possibility of fire and also enabling the unit to be driven from a remote source.

Other objects, advantages and features of invention may appear from the accompanying drawing, the subjoined detailed description and the appended claims.

In the drawing Figure l is a side elevation of my portable drillsleeve 3, formed on the case A rein 4 extends from the bar 2 to a leg of the derrick, thus holding the case against rotation, particularly when gglaing si. (o1. 2.55am,

k ing fihel'- is. a 9OHSi.t' le liajbleg tr in; a drilllI-igunit, 1

A fluid motor 5 is attached to the case this motor drives thepinion 6.,thevpini0n-"imtu-rn meshing with and-rotatingthegear .L 'whichjs attached to the shafts; The: gears fizzand'lia're. positioned 'in a gearcase. .9 ,'whi'ch;.is'- fixedly mounted-on, or may be, an integral partnfitbe housing I. A worm H). is mountedtonithe straits-8 and this worm meshes with a worm wheel II, which is mounted within the housing I in a substantially horizontal plane. The worm wheel I is fixedly attached'to, or may be, integral with a bushing l2, and this bushing is supported on bearings i3 and I4 within the housing I. The fluid motor 5 is provided with alternative intake pipes- I5 and I6, one driving the motor in one direction and the other in the opposite direction. A return or relief pipe I! also extends from the motor.

An elevator sub l8 screws into the top of the housing or is otherwise fixedly attached thereto. The elevator sub receives the elevators (not shown), which support instruments of this type. A ring |9 is used as a pick up eye to support the drilling unit while it is being moved into operating position in a derrick, that is, a hook can be inserted in the eye l9, thus supporting the entire unit to swing it into the derrick and also holding it while the elevators are being attached. A second eye 20 is fixedly attached to the housing and this eye extends horizontally so that the drilling unit can be pulled horizontally by means of block and tackle, or other means when it is desired to center the drilling unit at a particular point.

A drive-sub 2| is detachably secured to the lower end of the bushing I2 by means of the spindle cap or nut 22. The spindle nut screws on to the lower end of the bushing and shoulders on the sub 2|, thus holding the sub to rotate with the bushing, which is driven by the gear H, as previously described. The drive sub 2| can be replaced by removing the nut 22 when necessary.

Operation the drive sub 2|. The drive sub 2| screws into the pipe tubing or the like, which extends downwardly into the well, all of which is usual and well known in the art. When the particular work in the derrick is completed, the drilling unit can be quickly swung out of the derrick and removed to another location. 7

Having described my invention, I claim:

1. A portable drilling unit comprising a housing, a fluid motor mounted on said housing, a worm wheel journalledin said housing, a worm meshing with said worm wheel, gear means extending from said motor to said worm whereby the worm is rotated, a bushing depending from mounted on the'upper end of the-elevator sub.

SIST'I SIRACUSA.

the worm is rotated, a bushing depending from* I 7 the worm wheel a shoulder on the bushing above-a fil'e of this patent:

the worm wheel, a second shoulder on the bushing below the worm wheel, bearingsin said housing engaging the shoulders on the, bushing, ,a drive. I sub attached to the bushing and depending there from, a nut threaded on to said bushing and shouldering on the sub whereby the sub is detachably secured to the bushing, and an elevator'sub rising from said housing and threaded into said housing-. 1 e s 215A portable. drilling unit comprising a housing, a'fiuid motor, means fixedly attachingthe fluid motor on the outside of said housing, a worm. wheel journalled in said housing, a worm meshing with said. worm wheel, gear means ex: tending from said motor to said worm whereby v REFERENCES CITED The following references are of record in the UNITED STATES P TE'I'iTs Number Name Date 1,101,805 Lewis June 30, 1914 1,175,952 Haase Mar. 21, 1916 1,317, 15 .,G. ve IMa' iw, 1921 1,391,626 Gilthorpe Sept .20, 1921 1,971,922 fjSmithf V Aug.'28, 1934 2,081,200 Hollingswo'rth ii 3 125,193?

FOREIGN PATENTS Number Country Y Date I G ma "ft-" 77 

